Maryland Code, Insurance § 15-1213

(1) guaranteed issuance;

(2) guaranteed renewal; and

(3) adjusted community rating.

(c)(1) Each benefit offered in addition to the Standard Plan that increases the type of services available or the frequency of services is not subject to guaranteed issuance but is subject to all other provisions of this subtitle applicable to the Standard Plan, including:

(2) For each additional benefit offered under this subsection, a carrier shall accept or reject the application of the entire group.

(3) The Commissioner may prohibit a carrier from offering an additional benefit under this subsection if the Commissioner finds that the additional benefit will be sold in conjunction with the Standard Plan in a manner designed to promote risk selection or underwriting practices otherwise prohibited by this subtitle.